Knife Gate Valve and Industry Valve Manufacturer

Wafer Check Valve Guide Clearance

admin — Tue, 24 Apr 2012 02:05:03 +0000

Wafer Check Valve, or non-return valves, allow water or other material to flow in only one direction, and stop the material from flowing in the opposite direction. They are installed in pipe lines and do not require any activation from outside. Instead, they sense when the material in the pipes is beginning to move in the reverse direction and plug up the pipe to prevent the material’s movement.
1 Place the cylinder head on a solid work bench. Remove the valves from the cylinder head by compressing the valve spring and removing the retainer clips.
2 Insert a dial bore gauge into the valve guide. The Globe Valve guide is a tube or cylinder into which the valve stem is inserted and rides up and down as the valve opens and closes. Measure the valve guide diameter using the dial bore gauge.
3 Measure the valve stems of the valves that will be used in the cylinder head with a micrometer.
4 Subtract the diameter of the micrometer reading of the valve stem from the dial bore gauge diameter reading of the valve guide. For example, if the dial bore gauge reading of the valve guide is 0.342 inch and the micrometer reading of the valve stem is 0.340-inch, is the valve guide clearance is 0.002 inch.
The article comes from Knife Gate Valve.

Swing Check Valve – Different Kinds of Check Valves

admin — Thu, 19 Apr 2012 01:10:59 +0000

Swing Check Valve prevent the reversal of flow in plumbing systems. These valves achieve control over the direction of flow through the use of a control element. This element can take the form of a disc-shaped flapper, plunger or free-floating ball, depending on the type of valve. Most check valves are purely mechanical, but some styles have hydraulic or electrical control systems.
Butterfly Check Valve
Butterfly check valves regulate the flow of gas or liquid using a disk. They are commonly used in ventilation systems.
Swing Check Bellows Seal Globe Valve
Swing check valves are the most common in the market. They have a straight-body design or a Y-pattern.
Tilting Disk Check Valve
Tilting disk check valves have a design like that of swing check valves, but are different in that they use a disk without a hinge.
Stop Check Valve
Stop check valves have an external mechanism that stops the flow of liquid or gas, irrespective of the direction or pressure of the liquid or gas.
Piston Check Valves
Piston check valves, which are also referred to as lift check valves, operate under a mechanism in which pressure or an upward stream of fluid causes the disc to be lifted off its seat. This enables the liquid to flow to the outlet.
The article comes from Knife Gate Valve.

Test Dual Check Valve

admin — Wed, 11 Apr 2012 01:45:20 +0000

Dual Check Valve prevent the back flow of liquid or gas. Sprinkler and irrigation pumps often use check valves to stop water from draining out of the pump body when not in use. If the water flows out, the pump may require priming before it will siphon water again. Check valves are also used to prevent back flow contamination of water supplies to prevent flooding and prevent flow due to gravitational forces.
1 Shut off the water supply to the check valve. Follow the water line backwards (the flow of water is indicated by an arrow on the check valve) and switch off the next valve. Wait 15 to 20 minutes for the water pressure to subside.
2 Check the Tilting Disc Check Valve for debris by tapping its side with the handle of a screwdriver. A rattling sound means the check valve is fine, but inconsistent grinding or squeaking indicates that the valve is stuck on some form of debris. If the check valve is of the 90 degree (right angle) variety, remove the top of the valve (use the channel locks to turn the top of the valve to the left) and check the inside of the valve directly. There should be a dropping ball-pin on the inside, but nothing else. Replace the top of the valve.
3 Stand near the valve and have an assistant turn the water supply on for five seconds before quickly shutting it off again. Put your hand on the valve and place your ear near to it. If you feel or hear any water running, it is a sign that the valve’s seal is leaking. Most of the time, however, you will hear and feel a gentle “click” sound as the valve closes and water will cease running through the valve as the water is shut off.
The article comes from Gate Valve.

How A Slab Gate Valve Functions

admin — Tue, 27 Mar 2012 03:54:43 +0000

Gate valve: A Slab Gate Valve is used as an On-Off valve rather than a flow control valve.
When your industrial projects require valve components it is important to understand what your project needs and how you are going to fulfill those needs. When choosing a valve manufacturer and supplier it is important to understand their manufacturing capabilities and knowledge of the industry. It is prudent to call the manufacturer and speak with their sales representatives. How the company treats you on the phone is generally a good indication of how you will be treated should you decide to do business with them. When talking the manufacturer make sure to ask as many questions as possible. Some basic questions to ask are the manufacturers lead time, whether or not they have any sort of guarantee, if they are recognized by any governing organizations, will they send you a quote of your order. A manufacturer of quality valve components will be happy to answer any questions you have. It is important to feel comfortable with whatever supplier or manufacturer you choose, because your projects are important.
The flow is permitted to go when the handle of the faucet is turned counter clockwise. At this time, the water faucet’s gate rises. When the water faucet’s handle is turned clockwise, the gate is dropped thereby stopping the flow. There are even some types of gate valve that are used in a lot of industries that have electric motors. Signals are sent by human or computer intervention or automatically through a timer.
According to particular designs, this Bellows Seal Globe Valve is separated into various groups. The most popular valves are the solid wedge valve and flexible wedge. There are various kinds of bendable wedge valve that uses double disc parts that are bendable. The most common and widely utilized flexible wedge valve is the parallel side valve. Valves such as these are highly utilized in stem systems because it can endure contraction and expansion in the ever-changing climate conditions.
Its typical use is to close or open the flow. When the valves are opened, the force inside the pipes descends to a minimum level. These valve types commonly functions as valves for preliminary use in any pipe operation. On the other hand, valves can’t be utilized to regulate the movement of liquid in a direct style. It can either function to fully close or fully open the movement in the pipes.
A gate valve that incompletely opened can cause pulsations as well as long-lasting pipe damage. Fluid friction can also impair the valves’ seating portion if it is halfway opened. In valves like these, its design is particularly intended to block the flow completely or permitting the movement of liquid completely.
In most places right now, the non-rising stem as well as the rising stem valve are two of the commonly used valves. The valve is known as the rising stem is recognized through its string shaft that is turned by a handle located in the middle. The shaft is raised up when the handlebar is revolved. It rises when the valve is released and when the valve is shut, it drops down. Therefore, it is easier to know the valve shaft’s length placement above.
Another selection of these would include the stem valve that is non-rising. This is utilized in areas where there is a constraint in space. This commonly functions in below the ground pipes.
The article comes from Knife Gate Valve.

Trunnion Mounted Ball Valve for Versatility, Durability and Dependability

admin — Tue, 13 Mar 2012 03:28:23 +0000

Of all the various types of valves available on the market for liquids, Trunnion Mounted Ball Valve are probably the most common. Their popularity comes from the ability of this type of valve to be used in a wide variety of applications, providing positive sealing even after years of neglect.
A ball valve is a port valve that opens to let water in and closes to shut water off. It is named for the ball inside the valve that rotates. They are used in many areas due to their ease of repair and ability to withstand pressure and temperature. Depending on what they are made of, ball valves can hold up to 10,000 pounds per square inch and around 200 degrees Celsius. They range in size from a quarter-inch opening to a foot wide or larger.
Due to its basic design, ball Swing Check Valve are highly versatile. They can withstand high pressure without damage, and are easily adaptable to either manual operation, or solenoid operation. The design also adapts quickly to a variety of materials, permitting the same basic design to be used for corrosive liquids as well.
Since there is only one moving part, and very limited possibility of abrasion, ball valves are extremely long lasting. Unlike gate valves and some others, they do not need to be lubricated as a protection from the elements.
A variation of the ball valve, called a 3-way valve has the hole drilled through the ball in such a way as to form a ninety degree elbow. With this design, the valve can be used as a diverter valve, channeling an incoming liquid stream into either of two different directions, or shutting off the flow entirely. Another variation, the 4-way valve has a T drilled through the ball, allowing it to connect any three of four ports for more complicated diverter designs. Like the basic ball valve, these styles can be made for either manual or solenoid operation.
The article comes from Knife Gate Valve.

Significance of Slab Gate Valve

admin — Tue, 06 Mar 2012 05:29:08 +0000

Slab Gate Valve is one of the most popularly and widely used valves for domestic and industrial purposes. This valve is specifically used to obtain uninterrupted flow of water. Used mostly in isolated applications, this valve is greatly preferred because once the valve is in an open position; there is complete drop in the pressure which is due to the retraction of the gate into the bonnet.
According to specific designs, this valve is divided into different categories. The most commonly used valves include the flexible wedge and the solid wedge gate valve. There are different types of flexible wedge valves which utilises twin disc parts which are flexible. The parallel side valve is one of the most commonly and widely used flexible wedge valve. These valves are prominently used in stem systems as it can withstand expansion and contraction under varying climatic conditions.
Though the basic function of these Bellows Gate Valve is to control the flow of liquid, it can seldom be used to regulate the flow of liquid in a continuous manner. It is usually used to completely shut down or open the duct.
Most of the valves are designed specifically to allow free flow of liquid or to shut down the flow completely. However, there are valves which can be utilised to regulate the flow of liquid but it operates in a more complex manner and seldom lasts longer.
These valves are more often used to control the flow of liquids which are thicker in consistency such as cream, oil and so forth. Nevertheless, it can seldom be utilised for controlling the flow of clean liquids.
Gate valve is essential for applications where a shut-down mechanism is vital. These valves are reliable and efficient for timely control of liquid flow. Today a variety of valves can be bought from online and offline stores at reasonable price rates. Valves of different sizes and designs can be easily bought from a number of online stores at discounted rates.
The article comes from Knife Gate Valve.

Fix Gate Floating Ball Valve That Doesn’t Close

admin — Mon, 27 Feb 2012 08:37:02 +0000

Gate valve, which is also known as knife valve or slide, is basically used to control the flow of water or any kind of liquid through a pipe or duct. When these valves are turned a closure element moves up and down to obstruct the flow of liquid. It is widely used in many places including homes, factories, large industries, hotels and so forth.
1 Turn off the main water supply valve to your home. Open up the faucet nearest to gate valve that doesn’t close. This will drain the water from the line. If the faulty Bellows Gate Valve is on the hot water pipe, turn off the circuit breaker to the water heater.
2 Drain the water heater before repairing the gate valve if the gate valve is on a hot water line. There is a drain spigot at the bottom of the water heater. Attach one end of a garden hose to the drain and place the other end outside or in a nearby tub. Open the drain valve and allow the water to drain completely.
3 Hold the body of the gate valve on the neck below the handle with a pair of slip-joint pliers. Turn the nut at the base of the handle and valve body counterclockwise with an adjustable wrench while holding the gate valve steady with the slip-joint pliers.
4 Pull the handle straight out of the gate Floating Ball Valve body. Shine a flashlight into the open cavity of the gate valve. Look for debris or lime scale at the bottom of the gate valve.
5 Brush white vinegar vigorously inside the gate valve body with a small toothbrush. Allow the vinegar to sit for 15 minutes. The vinegar will loosen the sediment in the gate valve cavity.
6 Insert a stiff-bristle fitting brush into the gate valve body and twist the brush left to right, scrubbing the lime scale and sediment loose.
7 Remove the loose debris with a soft cloth. Spray compressed air into the valve to remove small particles as necessary.
8 Hold the gate valve handle in one hand and turn the gate on the threaded rod 1/4-turn clockwise with your other hand. This lowers the gate slightly. The gate is a circular machined plate that threads onto a shaft at the bottom of the handle.
9 Thread the handle back into the gate valve body. Hold the body with slip-joint pliers and rotate the handle nut clockwise with the adjustable wrench until it is tight.
10 Close the drain valve on the water heater and remove the hose if working on a hot water line. Turn on the water supply to the house. Allow the water heater to fill completely before turning on the circuit breaker to the unit.
The article comes from Knife Gate Valve.

Reduce Cryogenic Gate Valve

admin — Tue, 21 Feb 2012 06:23:56 +0000

A Cryogenic Gate Valve is a type of stopper placed on a pipe system to block flow. These valves simply prevent the passage of liquid using a wedge that slides in and out of the pipe. In most cases, the gate valve is designed to be completely opened or completely closed. As a result, these valves are rarely used as a means of flow control; they generally just stop flow completely or are unused. Partially-closed gate valves may increase pressure in a system in unpredictable ways or cause vibration in the liquid.
1 Turn off or kill the fluid source up the line from the gate valve you want to reduce. Preferably, this would be at another gate valve. If possible, open the down line release and drain the fluid from the pipe.
2 Detach the down line side of the Bellows Gate Valve from the existing pipe with the pipe wrench. Remove the flange bolts if the gate valve is flanged or unscrew the collar if the valve is threaded.
3 Attach the reducer down line of the gate valve. Beforehand, cover the pipe threads with Teflon tape, if the gate valve is threaded. If it is flanged, cover the flange gasket with silicone.
4 Attach the replacement pipe to the reducer.
The article comes from Gate Valve.

Repair Check Valve

admin — Tue, 14 Feb 2012 07:31:08 +0000

Inside the valve, there is a ball that has a port, which is actually a hole at the middle. When this hole is aligned with both Trunnion Mounted Ball Valve ends, liquid can flow easily through it. After the valve has been closed, the hole becomes perpendicular to the valve ends impeding the flow of liquid.
Lots of different industries make use of ball valves in order to control fluid. Some of these industries are oil and gas manufacturers, chemical and petrochemical manufacturers, paper manufacturers, the textile manufacturing, power plants, steel manufacturers, pharmaceuticals processing and water and sewage plants.
1 Turn the water supply off in your home. Use your allen wrench to remove the screw on the side of the handle of the Check Valve , and remove both the screw and the handle. With these items removed, slide the gray plastic disc and the metal sleeve off of the Valve.
2 Use a strap wrench to remove the brass ring that is holding the remainder of the Valve in place. Once the brass ring is removed, use slow and steady pressure to remove the Valve assembly from its place by twisting the unit counterclockwise until it comes loose. Place a towel beneath the opening, as there is likely to still be some excess water in the pipes.
3 Open the Valve assembly by simultaneously pressing in and twisting on the blue half. Pull out the black rubber seats from the blue half and replace them with the new pieces found in the repair kit. These rubber pieces are the key to eliminating the leak you are experiencing in your shower.
4 Place the springs and rubber seats in place and twist the blue and white pieces back together to rejoin them. Re-insert the Valve assembly into the brass sleeve, and use the strap wrench to secure it in place with the brass ring. Slip the sleeve back onto the assembly and put the gray disk back into place. Re-attach the shower Valve handle and turn on the water supply in your home.
The article omes from Gate Valve.

Seats Of Bellows Seal Globe Valve

admin — Wed, 08 Feb 2012 01:39:02 +0000

The seat,such as Bellows Seal Globe Valve,is the interior surface of the body which contacts the disc to form a leak-tight seal. In discs that move linearly or swing on a hinge or trunnion, the disc comes into contact with the seat only when the valve is shut. In disks that rotate, the seat is always in contact with the disk, but the area of contact changes as the disc is turned. The seat always remains stationary relative to the body.
Globe valve seats are either integrated or screwed in to the China Knife Gate Valve body. Many globe valves have backseats inside the bonnet. Back seats provides a seal between the stem and bonnet and prevents system pressure from building against the valve pakking, when the valve is fully open. Back seats are often applied in globe valves.
The seat ring provides a stable, uniform and replaceable shut off surface. Seat rings are usually held in place by pressure from the fastening of the bonnet to the top of the body. This pushes the cage down on the lip of the seat ring and holds it firmly to the body of the valve. Seat rings may also be threaded and screwed into a thread cut in the same area of the body. However this method makes removal of the seat ring during maintenance difficult if not impossible. Seat rings are also typically beveled at the seating surface to allow for some guiding during the final stages of closing the valve.
Economical globe valves or stop valves with a similar mechanism used in plumbing often have a rubber washer at the bottom of the disc for the seating surface, so that rubber can be compressed against the seat to form a leak-tight seal when shut.
The article comes from Knife Gate Valve.